Nokia and T-Mobile have officially announced Nokia’s first new smartphone in the US since switching to Windows Phone: the Lumia 710.

The Nokia Lumia 710 will launch on T-Mobile on January 11 and sell for $50 with two-year contract (after a $50 rebate). The Lumia 710 will run on T-Mobile’s HSPA 14.4 network, which will make it one of the first “4G” Windows Phones. In case you’ve forgotten in the hype around the Lumia 800, the 710 is a fairly impressive phone in it’s own right. It packs a 1.4GHz Snapdragon CPU, a 3.7-inch ClearBlack display, 512MG of RAM, a 5MP camera that can shoot 720p video, and 8GB of internal storage space. At $50 it’s a fairly powerful phone for the price, it just pales in comparison to the Lumia 800 that was announced on the same day.

Nokia has said that this is just one part of it’s plan to re-enter the US. The Finnish company won’t say anything about what else we can expect, but it could be that we’ll hear a bit more come CES in January. Nokia will put a lot or marketing behind its new phones in the US, including this Lumia 710. We’ll be sure to let you know when we find out more. For now, we can at least be happy that the Lumia 710 will be coming, which should be a great first smartphone, or at least and great inexpensive smartphone.